On Mon, 16 Sep 2019 15:56:28 +0200
Sean Nyekjaer <sean@xxxxxxxxxx> wrote:
> This add ways for the SoC to wake from accelerometer wake events.
>
> In the suspend function we skip disabling the sensor if wakeup-source
> and events are activated.
>
> Signed-off-by: Sean Nyekjaer <sean@xxxxxxxxxx>
Applied to the togreg branch of iio.git and pushed out as testing for
the autobuilders to poke it.
Thanks,
Jonathan
> ---
> Changes since v4:
> * More devices supports wakeup
>
> Changes since v5:
> * None
>
> Changes since v6:
> * None
>
> Changes since v7:
> * Add check for hw->enable_event
> * Moved disable_irq_wake section so it's called
> * Removed not neeeded continue from disable_irq_wake section
>
> Changes since v8:
> * Using sensor->id instead of i in suspend/resume loops
>
> Changes since v9:
> * None
>
> drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
>
> diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
> index 4198ba263d03..a7f12cf57f11 100644
> --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
> +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
> @@ -1858,6 +1858,9 @@ int st_lsm6dsx_probe(struct device *dev, int irq, int hw_id,
> return err;
> }
>
> + if (dev->of_node && of_property_read_bool(dev->of_node, "wakeup-source"))
> + device_init_wakeup(dev, true);
> +
> return 0;
> }
> EXPORT_SYMBOL(st_lsm6dsx_probe);
> @@ -1876,6 +1879,13 @@ static int __maybe_unused st_lsm6dsx_suspend(struct device *dev)
> if (!(hw->enable_mask & BIT(sensor->id)))
> continue;
>
> + if (device_may_wakeup(dev) &&
> + sensor->id == ST_LSM6DSX_ID_ACC && hw->enable_event) {
> + /* Enable wake from IRQ */
> + enable_irq_wake(hw->irq);
> + continue;
> + }
> +
> if (sensor->id == ST_LSM6DSX_ID_EXT0 ||
> sensor->id == ST_LSM6DSX_ID_EXT1 ||
> sensor->id == ST_LSM6DSX_ID_EXT2)
> @@ -1905,6 +1915,10 @@ static int __maybe_unused st_lsm6dsx_resume(struct device *dev)
> continue;
>
> sensor = iio_priv(hw->iio_devs[i]);
> + if (device_may_wakeup(dev) &&
> + sensor->id == ST_LSM6DSX_ID_ACC && hw->enable_event)
> + disable_irq_wake(hw->irq);
> +
> if (!(hw->suspend_mask & BIT(sensor->id)))
> continue;
>
